We look at the division of 85157671 by 643 
We want to figure out the number of times 85157671 can be divided by 643.

Step 1:
643 can be fit into 8 0 times, resulting in a remainder of 8.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 8 after subtracting 0 from 8.
Append the next digit (5) from the dividend to 8 and continue with: 85 / 643

On to step 2:
643 can be fit into 85 0 times, resulting in a remainder of 85.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 85, we get 85.
Take the next digit (1) from the dividend and append it to 85, then repeat: 851 / 643

Step 3:
When dividing 851 by 643, we get 1 with a remainder of 208.
Use 1 as the next digit of our solution. 
Result so far: 1.0
Subtract 643 from 851 to get 208.
Bring next digit (5) of the dividend behind the 208 and repeat the process: 2085 / 643

Moving on to step 4:
The number 643 fits into 2085 3 times, leaving a remainder of 156.
Put 3 as the next digit of the answer. 
Result so far: 13.0
Subtract 1929 from 2085 to get 156.
Append the next digit (7) from the dividend to 156 and continue with: 1567 / 643

Going ahead to step 5:
643 goes into 1567 2 times with a remainder of 281.
Use 2 as the next digit of our solution. 
Result so far: 132.0
If we take 1286 away from 1567, we end up with 281.
Grab the next digit (6) from the dividend, add it to 281, then carry on: 2816 / 643

On to step 6:
643 goes into 2816 4 times with a remainder of 244.
Write down 4 as next digit of the result. 
Result so far: 1324.0
Subtract 2572 from 2816 to get 244.
Append the next digit (7) from the dividend to 244 and continue with: 2447 / 643

Advancing to step 7:
If we divide 2447 by 643, we get 3 and a remainder of 518.
Put 3 as the next digit of the answer. 
Result so far: 13243.0
Subtracting 1929 from 2447 leaves us with 518.
Take the next digit (1) from the dividend and append it to 518, then repeat: 5181 / 643

Let's proceed to step 8:
643 goes into 5181 8 times with a remainder of 37.
Record the quotient 8 as the next digit in the result. 
Result so far: 132438.0
The remainder is 37 after subtracting 5144 from 5181.
Since there are no more digits in the dividend, we add a zero to the remainder making it 370, and continue the process.

Let's proceed to step 9:
When dividing 370 by 643, we get 0 with a remainder of 370.
The next digit of our result is 0. 
Result so far: 132438.0
Subtract 0 from 370 to get 370.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3700, and continue the process.

Moving on to step 10:
643 goes into 3700 5 times with a remainder of 485.
Use 5 as the next digit of our solution. 
Result so far: 132438.05
If we subtract 3215 from 3700, we get 485.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4850, and continue the process.

Going ahead to step 11:
When dividing 4850 by 643, we get 7 with a remainder of 349.
Use 7 as the next digit of our solution. 
Result so far: 132438.057
The remainder is 349 after subtracting 4501 from 4850.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3490, and continue the process.

Going ahead to step 12:
The number 643 fits into 3490 5 times, leaving a remainder of 275.
Use 5 as the next digit of our solution. 
Result so far: 132438.0575
Deduct 3215 from 3490 and we're left with 275.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2750, and continue the process.

Going ahead to step 13:
The number 643 fits into 2750 4 times, leaving a remainder of 178.
Record the quotient 4 as the next digit in the result. 
Result so far: 132438.05754
Subtract 2572 from 2750 to get 178.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1780, and continue the process.

Moving on to step 14:
1780 divided by 643 is 2 with a remainder of 494.
The next digit of our result is 2. 
Result so far: 132438.057542
Subtracting 1286 from 1780 leaves us with 494.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4940, and continue the process.

Going ahead to step 15:
The number 643 fits into 4940 7 times, leaving a remainder of 439.
Use 7 as the next digit of our solution. 
Result so far: 132438.0575427
Subtract 4501 from 4940 to get 439.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4390, and continue the process.

Step 16:
4390 divided by 643 is 6 with a remainder of 532.
Write down 6 as next digit of the result. 
Result so far: 132438.05754276
The remainder is 532 after subtracting 3858 from 4390.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5320, and continue the process.

The final outcome is 132438.05754276, with a leftover of 5.32e-07.